We are thrilled to announce that Heroku Automated Certificate Management (ACM) now supports wildcard domains for the Common Runtime! Heroku ACM’s support for wildcard domains streamlines your cloud management by allowing Heroku’s Certificate management to cover all your desired subdomains with only one command, reducing networking setup overhead and providing more flexibility while enhancing the overall security of your applications. This highly-requested feature request is here, and in this blog post, we'll dive into what wildcard domains are, why you should use them, and the new possibilities this support brings to Heroku ACM. What’s a Wildcard Domain and Why Should I Use It? A wildcard domain is a domain that includes a wildcard character (an asterisk, *) in place of a subdomain. For example, *.example.com is a wildcard domain that can cover www.example.com , blog.example.com , shop.example.com , and any other subdomain of example.com.…